From: Andi Kleen <andi@firstfloor.org>
To: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Cc: mingo@elte.hu, joerg.roedel@amd.com, linux-kernel@vger.kernel.org
Subject: Re: [PATCH 0/3] fix GART to respect device's dma_mask about virtual mappings
Date: Tue, 16 Sep 2008 02:54:32 +0200 [thread overview]
Message-ID: <87hc8grjuf.fsf@basil.nowhere.org> (raw)
In-Reply-To: <1221216155-17640-1-git-send-email-fujita.tomonori@lab.ntt.co.jp> (FUJITA Tomonori's message of "Fri, 12 Sep 2008 19:42:32 +0900")
FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> writes:
> Currently, gart IOMMU ignores device's dma_mask when it does virtual
> mappings. So it could give a device a virtual address that the device
> can't access to.
Huh? That is what the need_iommu() logic in gart_map_sg()
does. An I'm not aware of any bugs in this area.
Did you actually see that failure in practice? I don't see
how it could happen.
-Andi
--
ak@linux.intel.com
next prev parent reply other threads:[~2008-09-16 0:54 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-09-12 10:42 [PATCH 0/3] fix GART to respect device's dma_mask about virtual mappings FUJITA Tomonori
2008-09-12 10:42 ` [PATCH 1/3] add iommu_device_max_index IOMMU helper function FUJITA Tomonori
2008-09-12 10:42 ` [PATCH 2/3] add dma_get_mask " FUJITA Tomonori
2008-09-12 10:42 ` [PATCH 3/3] x86: make GART to respect device's dma_mask about virtual mappings FUJITA Tomonori
2008-09-12 14:52 ` Joerg Roedel
2008-09-12 15:11 ` FUJITA Tomonori
2008-09-14 14:45 ` [PATCH 0/3] fix " Ingo Molnar
2008-09-16 0:54 ` Andi Kleen [this message]
2008-09-16 13:20 ` FUJITA Tomonori
2008-09-16 13:43 ` Andi Kleen
2008-09-16 17:13 ` FUJITA Tomonori
2008-09-16 17:58 ` Andi Kleen
2008-09-16 23:53 ` FUJITA Tomonori
2008-09-17 0:24 ` Andi Kleen
2008-09-17 19:20 ` FUJITA Tomonori
2008-09-18 18:20 ` Andi Kleen
2008-09-18 22:15 ` FUJITA Tomonori
2008-09-19 0:44 ` Andi Kleen
2008-09-22 19:12 ` FUJITA Tomonori
2008-09-22 20:35 ` Andi Kleen
2008-09-23 4:02 ` FUJITA Tomonori
2008-09-17 10:43 ` Ingo Molnar
2008-09-18 18:25 ` Andi Kleen
2008-09-16 15:52 ` Joerg Roedel
2008-09-16 16:20 ` Andi Kleen
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